1. Department of PhysicsBudapest University of Technology and Economics and MTA-BME Lendület Spintronics Research Group (PROSPIN) P.O. Box 91 H-1521 Budapest Hungary
2. Laboratory of Physics of Complex MatterFBS Swiss Federal Institute of Technology (EPFL) CH-1015 Lausanne Switzerland
3. School of Physical Sciences and NanotechnologyYachay Tech. University 100119 Urcuquí Ecuador
4. Faculty of PhysicsUniversity of Vienna Strudlhofgasse 4 A-1090 Vienna Austria